融资融券对a股波动性的影响分析-analysis of the influence of margin trading and short selling on the volatility of a shares.docxVIP
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融资融券对a股波动性的影响分析-analysis of the influence of margin trading and short selling on the volatility of a shares
融资融券是股票市场重要的多空交易机制,具有套期保值、稳定市场、增加流动性以及价格发现等功能,对于股票市场功能发挥具有不可替代的作用。2010年3月31日,我国推出了融资融券交易机制,随着融资融券的正式启动,A股市场告别了多年的单边做多机制,成为我国证券市场发展的里程碑。但是,在现实中,我国的融资融券交易能否起到熨平市场波动的效果?如果可以平抑市场波动,那么这个影响的程度又如何论文首先对融资融券及股市波动性的概念进行界定,梳理了融资融券影响股市波动性的作用机制,分析了融资融券影响股市波动的制约因素,在此基础上,以我国A股市场融资融券交易及沪深300指数运行的数据为样本,运用OLS回归、格兰杰因果检验、描述性统计分析、GARCH模型等方法进行实证分析,并对实证结果进行解释。研究结果表明:从短期来讲,融资交易的发生使股价指数上涨,但是融券交易对股市波动性的影响不具有显著性,另外,融资、融券与波动性之间分别存在单向的因果关系,即融资交易是股市波动的格兰杰原因,股市波动是融券交易的格兰杰原因,这一结果与我国股票市场的特殊情况有关。就长期而言,通过前后的比较可以发现,融资融券推出后A股市场的波动减小了,但是从实证数据来看,市场波动减小的幅度不大,说明融资融券还未充分发挥其平抑市场波动的作用。【关键词】融资融券A股市场波动性GARCH模型Themarginistheimportantlongandshortstockmarkettradingmechanism,hashedging,stabilizethemarket,increasetheliquidityandpricediscoveryfunction,toplayanirreplaceableroleinthestockmarketfunctions.March31,2010,Chinalaunchedthemargintradingmechanism,withtheofficialstartofthemargin,theA-sharemarkethasbidfarewelltotheyearsofunilateraldomoremechanismstobecomeamilestoneinthedevelopmentofChinassecuritiesmarket.However,inreality,themargintradinginChinacanplayaneffectofreducingmarketvolatility?Ifitcanstabilizethemarketvolatility,howisthisextentoftheimpact?Firstly,todefinetheconceptofmargintradingandstockmarketvolatility,combingthemechanismofactionofthemarginimpactofstockmarketvolatility,themarginconstraintsaffectthestockmarketvolatility,onthisbasis,ChinasA-sharemarketofmargintradingandCSI300indexrunningthesampledata,theuseofOLSregression,Grangercausalitytest,descriptivestatisticalanalysis,GARCHmodel,empiricalanalysis,andinterpretationofempiricalresults.Theresultsshowthat:Intheshortterm,thefinancingtransactionoccurredstockindexrose,butdoesnothaveasignificantmargintradingonthestockmarketvolatility,margintradingandvolatilitybetweenthereisaone-waycausalrelationship,thatisfinancingtransactionsGrangercausevolatilityinthestockmarket,stockmarketvolatilityisGrangerreasonoftheshortsale,thisresultisthespecialcaseofthestockmarketinChina.Beforeandaftercomparisoncanbefoundinthelongrun,bythefluctuationsoftheA-sharemarketaftertheintrodu
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